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Cisco VPN settings

I am trying to pass a Windows XP client VPN connection through a 1720 Cisco router to a Windows Server 2000 host. I have permitted port 1723 through the GRE47 protocol but I am not sure of the correct syntax. I receive error 769 "Destination unreachable" Can someone tell me how to correctly open the Cisco for Microsoft VPN traffic?

The first line opens port 1723 and the second line opens for the gre protocol.This access list would then be applied to the interface where the XP clientis connected to the router. You can make this more secure by being more specificand changing the 'any' to the IP address of the XP client or changing it to thenetwork reference where the XP client is.

This is just the tunnel access part of the changes that you would need to add. Also remember to construct your access-lists so that you don't deny all traffic when you apply it to the interface. You can apply it to an interface with the following lines:

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